:root {
  --bg: #06111f;
  --bg-soft: #0a192b;
  --surface: rgba(255, 255, 255, .07);
  --surface-strong: rgba(255, 255, 255, .105);
  --line: rgba(255, 255, 255, .13);
  --line-strong: rgba(255, 255, 255, .2);
  --text: #f8fbff;
  --muted: #afc0d7;
  --blue: #62a6ff;
  --cyan: #52d8d0;
  --green: #45daa0;
  --violet: #9a82ff;
  --shadow: 0 24px 84px rgba(0, 0, 0, .36);
  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  background:
    radial-gradient(circle at 10% 4%, rgba(79, 155, 255, .25), transparent 27%),
    radial-gradient(circle at 90% 7%, rgba(82, 216, 208, .16), transparent 26%),
    radial-gradient(circle at 50% 56%, rgba(154, 130, 255, .08), transparent 34%),
    linear-gradient(180deg, #071320 0%, #0a192a 46%, #06111f 100%);
}

a { color: inherit; }
img { display: block; max-width: 100%; }
button, summary { font: inherit; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255, 255, 255, .09);
  background: rgba(4, 13, 24, .84);
  backdrop-filter: blur(18px);
}
.nav-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 900;
  letter-spacing: -.25px;
  text-decoration: none;
  white-space: nowrap;
}
.brand-mark {
  width: 43px;
  height: 43px;
  flex: 0 0 auto;
  overflow: hidden;
  border: 1px solid rgba(111, 177, 255, .35);
  border-radius: 14px;
  background: #071329;
  box-shadow: 0 12px 34px rgba(86, 194, 255, .25);
}
.brand-mark img { width: 100%; height: 100%; object-fit: cover; }
.nav-links { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: 14px; }
.nav-links a { text-decoration: none; transition: color .18s ease; }
.nav-links a:hover,
.nav-links a:focus-visible { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 10px; }

.btn {
  min-height: 48px;
  padding: 13px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: 16px;
  color: #06101d;
  background: linear-gradient(135deg, #fff, #d9ebff);
  box-shadow: 0 16px 38px rgba(79, 155, 255, .2);
  font-weight: 850;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 20px 48px rgba(79, 155, 255, .29); }
.btn.secondary {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, .075);
  box-shadow: none;
}
.btn.compact { min-height: 44px; padding: 11px 17px; border-radius: 15px; }
.btn:focus-visible,
summary:focus-visible,
a:focus-visible { outline: 3px solid rgba(98, 166, 255, .65); outline-offset: 3px; }

.breadcrumbs {
  padding: 24px 0 0;
  display: flex;
  align-items: center;
  gap: 9px;
  color: #91a8c5;
  font-size: 13px;
}
.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { color: var(--text); }
.breadcrumbs span[aria-hidden] { opacity: .5; }

.hero { padding: 46px 0 58px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.03fr .97fr;
  align-items: center;
  gap: 52px;
}
.eyebrow {
  margin-bottom: 20px;
  padding: 9px 14px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: #dcecff;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .065);
  font-size: 14px;
}
.eyebrow-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(69, 218, 160, .12);
}
h1 {
  margin: 0 0 22px;
  max-width: 760px;
  font-size: clamp(43px, 5.7vw, 70px);
  line-height: .99;
  letter-spacing: -3px;
}
.lead {
  margin: 0;
  max-width: 760px;
  color: #c0cde0;
  font-size: 19px;
  line-height: 1.67;
}
.hero-actions { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }
.article-meta {
  margin-top: 24px;
  color: #8fa4bf;
  font-size: 13px;
}
.hero-media {
  position: relative;
  min-height: 510px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 34px;
  background: #050d19;
  box-shadow: var(--shadow);
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 48%, rgba(3, 8, 17, .58));
  pointer-events: none;
}
.hero-media img { width: 100%; height: 100%; min-height: 510px; object-fit: cover; }
.hero-note {
  position: absolute;
  z-index: 2;
  right: 20px;
  bottom: 20px;
  left: 20px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(4, 11, 22, .78);
  backdrop-filter: blur(16px);
}
.hero-note strong { display: block; margin-bottom: 4px; }
.hero-note span { color: var(--muted); font-size: 13px; line-height: 1.4; }
.status {
  flex: 0 0 auto;
  padding: 8px 11px;
  color: #8af0c5 !important;
  border: 1px solid rgba(69, 218, 160, .26);
  border-radius: 999px;
  background: rgba(69, 218, 160, .09);
}

.quick-list {
  padding: 0 0 56px;
}
.quick-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.quick-item {
  padding: 20px;
  display: flex;
  gap: 13px;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .055);
}
.quick-icon {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  color: #06101d;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  font-weight: 950;
}
.quick-item strong { display: block; margin-bottom: 5px; }
.quick-item span { color: var(--muted); font-size: 14px; line-height: 1.45; }

.section { padding: 70px 0; }
.section.compact { padding-top: 30px; }
.section-head { max-width: 800px; margin-bottom: 34px; }
.section-kicker {
  display: block;
  margin-bottom: 12px;
  color: #8ec9ff;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .11em;
  text-transform: uppercase;
}
h2 {
  margin: 0 0 16px;
  font-size: clamp(33px, 4.4vw, 52px);
  line-height: 1.05;
  letter-spacing: -2px;
}
h3 { margin: 0 0 10px; font-size: 22px; line-height: 1.2; letter-spacing: -.45px; }
.section-head p,
.prose p {
  margin: 0 0 17px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.72;
}
.prose {
  max-width: 850px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, rgba(255, 255, 255, .085), rgba(255, 255, 255, .045));
  box-shadow: 0 22px 70px rgba(0, 0, 0, .18);
}
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--text); }
.prose a { color: #8ec9ff; }

.steps { display: grid; gap: 13px; }
.step {
  padding: 21px 22px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .055);
}
.step-number {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: #05101e;
  border-radius: 15px;
  background: linear-gradient(135deg, #6fb1ff, #56dfbd);
  font-weight: 950;
}
.step p,
.feature-card p,
.scenario p,
.related-card p { margin: 0; color: var(--muted); line-height: 1.62; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.feature-card {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .04));
}
.feature-icon {
  width: 43px;
  height: 43px;
  margin-bottom: 20px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(98, 166, 255, .28);
  border-radius: 14px;
  background: rgba(98, 166, 255, .1);
  font-size: 20px;
}

.scenario {
  padding: 32px;
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 0 0, rgba(82, 216, 208, .12), transparent 38%),
    linear-gradient(145deg, rgba(255, 255, 255, .085), rgba(255, 255, 255, .045));
}
.scenario-flow { display: grid; gap: 10px; }
.scenario-row {
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(3, 10, 20, .44);
}
.scenario-row b {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: #06101d;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
}
.scenario-row strong { display: block; margin-bottom: 3px; }
.scenario-row span { color: var(--muted); font-size: 14px; line-height: 1.45; }

.faq { display: grid; gap: 11px; }
details {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .055);
}
summary {
  padding: 20px 22px;
  cursor: pointer;
  list-style: none;
  font-weight: 800;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: #8ec9ff; font-size: 22px; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { margin: 0; padding: 0 22px 21px; color: var(--muted); line-height: 1.65; }

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.related-card {
  min-height: 185px;
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .055);
  text-decoration: none;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.related-card:hover {
  transform: translateY(-3px);
  border-color: rgba(98, 166, 255, .42);
  background: rgba(98, 166, 255, .085);
}
.related-card small {
  display: block;
  margin-bottom: 12px;
  color: #8ec9ff;
  font-weight: 850;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.cta {
  position: relative;
  padding: 38px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 85% 20%, rgba(154, 130, 255, .2), transparent 30%),
    linear-gradient(135deg, rgba(98, 166, 255, .13), rgba(82, 216, 208, .07));
  box-shadow: var(--shadow);
}
.cta h2 { max-width: 750px; }
.cta p { max-width: 720px; color: var(--muted); font-size: 18px; line-height: 1.65; }

footer {
  margin-top: 75px;
  padding: 32px 0 42px;
  color: #93a6bf;
  border-top: 1px solid rgba(255, 255, 255, .09);
}
.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px;
}
.footer-links {
  max-width: 760px;
  display: flex;
  justify-content: flex-end;
  gap: 12px 18px;
  flex-wrap: wrap;
}
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--text); }
.footer-copy {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: 13px;
  line-height: 1.55;
}

@media (max-width: 980px) {
  .nav-links { display: none; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-media { min-height: 460px; }
  .hero-media img { min-height: 460px; }
  .feature-grid,
  .related-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .scenario { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .container { width: min(100% - 28px, 1180px); }
  .nav-inner { min-height: 66px; }
  .brand-mark { width: 39px; height: 39px; border-radius: 13px; }
  .brand > span:last-child { font-size: 14px; }
  .nav-actions .secondary { display: none; }
  .btn.compact { min-height: 41px; padding: 9px 13px; font-size: 13px; }
  .breadcrumbs { padding-top: 18px; overflow-x: auto; white-space: nowrap; }
  .hero { padding-top: 34px; }
  h1 { font-size: clamp(39px, 12vw, 57px); letter-spacing: -2.4px; }
  .lead { font-size: 17px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-media,
  .hero-media img { min-height: 400px; }
  .hero-note { right: 13px; bottom: 13px; left: 13px; }
  .quick-grid,
  .feature-grid,
  .related-grid { grid-template-columns: 1fr; }
  .section { padding: 54px 0; }
  .prose,
  .scenario,
  .cta { padding: 24px; }
  .step { grid-template-columns: 42px 1fr; padding: 18px; }
  .step-number { width: 42px; height: 42px; }
  .footer-top { flex-direction: column; }
  .footer-links { justify-content: flex-start; }
}